thread 'main' panicked at .... is not a valid Ident

[aholtzma-am]

The problem occurs on an otherwise working codebase when built on Sonoma 14.0. Looking at the very few times I can find this message coming up, it was related to the wrong libclang being used, but I don't have another other copies or clang or llvm.

How should I go about debugging this?

Input C/C++ Header

Failure is somewhere in MacOS system headers on Sonoma 14.0.

Bindgen Invocation

  let bindings = bindgen::Builder::default()
        // The input header we would like to generate
        // bindings for.
        .header("wrapper.h")
        .clang_arg("-I/opt/homebrew/include")
        .clang_arg("-L/opt/homebrew/lib")
        // Don't convert size_t to an int of the pointer size
        .size_t_is_usize(true)
        // Finish the builder and generate the bindings.
        .generate()
        // Unwrap the Result and panic on failure.
        .expect("Unable to generate bindings");

Actual Results

thread 'main' panicked at '"wait_struct_(unnamed_at_/Applications/Xcode_app/Contents/Developer/Platforms/MacOSX_platform/Developer/SDKs/MacOSX_sdk/usr/include/sys/wait_h_199_2)" is not a valid Ident', /Users/aholtzma/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bindgen-0.56.0/src/ir/context.rs:846:9
stack backtrace:
0: rust_begin_unwind
at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/std/src/panicking.rs:593:5
1: core::panicking::panic_fmt
at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/core/src/panicking.rs:67:14
2: proc_macro2::fallback::validate_ident
3: proc_macro2::fallback::Ident::new_checked
4: proc_macro2::imp::Ident::new_checked
5: proc_macro2::Ident::new
6: bindgen::ir::context::BindgenContext::rust_ident_raw
7: bindgen::ir::context::BindgenContext::rust_ident
8: <bindgen::ir::comp::CompInfo as bindgen::codegen::CodeGenerator>::codegen
9: <bindgen::ir::ty::Type as bindgen::codegen::CodeGenerator>::codegen
10: <bindgen::ir::item::Item as bindgen::codegen::CodeGenerator>::codegen
11: <bindgen::ir::comp::CompInfo as bindgen::codegen::CodeGenerator>::codegen
12: <bindgen::ir::ty::Type as bindgen::codegen::CodeGenerator>::codegen
13: <bindgen::ir::item::Item as bindgen::codegen::CodeGenerator>::codegen
14: <bindgen::ir::module::Module as bindgen::codegen::CodeGenerator>::codegen::{{closure}}
15: <bindgen::ir::module::Module as bindgen::codegen::CodeGenerator>::codegen
16: <bindgen::ir::item::Item as bindgen::codegen::CodeGenerator>::codegen
17: bindgen::codegen::codegen::{{closure}}
18: bindgen::ir::context::BindgenContext::gen
19: bindgen::codegen::codegen
20: bindgen::Bindings::generate
21: bindgen::Builder::generate
22: build_script_build::main
23: core::ops::function::FnOnce::call_once
note: Some details are omitted, run with RUST_BACKTRACE=full for a verbose backtrace.

Expected Results

The build to be successful.

[emilio]

You need to update bindgen. You're using 0.56.0 which doesn't contain the relevant fix iirc.

[aholtzma-am]

Am on 0.56.0.

[[package]]
name = "bindgen"
version = "0.56.0"

[aholtzma-am]

What can I do to debug this? It panics before the bindings are output. Is there a debug mode I can turn on?

[emilio]

You need a newer version of bindgen. We fixed this a while ago. #2319 landed in 0.65.1 and such.

[aholtzma-am]

Sorry misread your comment that you needed to be running 0.56.0 with the fix. Thanks.